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Taskbar Notification dialog

, 11 Jul 2002
A MSN IM-style popup notification dialog
taskbarnotifier_demo.zip
TaskBarNotifierDemo
res
skinboard.bmp
skinbox.bmp
skinguy.bmp
skinmsn.bmp
TaskBarNotifierDemo.ico
TaskBarNotifierDemo.manifest
Release
TaskBarNotifierDemo.exe
taskbarnotifier_src.zip
// TaskbarNotifier.cpp : implementation file
// By John O'Byrne - 05 July 2002

#include "stdafx.h"
#include "TaskbarNotifier.h"

#define IDT_HIDDEN		0
#define IDT_APPEARING		1
#define IDT_WAITING		2
#define IDT_DISAPPEARING	3

#define TASKBAR_ON_TOP		1
#define TASKBAR_ON_LEFT		2
#define TASKBAR_ON_RIGHT	3
#define TASKBAR_ON_BOTTOM	4

// CTaskbarNotifier

IMPLEMENT_DYNAMIC(CTaskbarNotifier, CWnd)
CTaskbarNotifier::CTaskbarNotifier()
{
	m_strCaption="";
	m_pWndParent=NULL;
	m_bMouseIsOver=FALSE;
	m_hSkinRegion=NULL;
	m_hCursor=NULL;
	m_crNormalTextColor=RGB(133,146,181);
	m_crSelectedTextColor=RGB(10,36,106);
	m_nSkinHeight=0;
	m_nSkinWidth=0;
	
	m_dwTimeToShow=0;
	m_dwTimeToLive=0;
	m_dwTimeToHide=0;
	m_dwDelayBetweenShowEvents=0;
	m_dwDelayBetweenHideEvents=0;
	m_nStartPosX=0;
	m_nStartPosY=0;
	m_nCurrentPosX=0;
	m_nCurrentPosY=0;
	m_nIncrement=2;
	m_nTaskbarPlacement=0;
	m_nAnimStatus=IDT_HIDDEN;
	m_rcText.SetRect(0,0,0,0);
}

CTaskbarNotifier::~CTaskbarNotifier()
{
	// No need to delete the HRGN,  SetWindowRgn() owns it after being called
}

int CTaskbarNotifier::Create(CWnd *pWndParent)
{
	m_pWndParent=pWndParent;
	CString strWndClass=AfxRegisterWndClass(0,AfxGetApp()->LoadStandardCursor(IDC_ARROW),GetSysColorBrush(COLOR_WINDOW),NULL);
	return CreateEx(0,strWndClass,NULL,WS_POPUP,0,0,0,0,pWndParent->m_hWnd,NULL);
}

void CTaskbarNotifier::SetTextFont(LPCTSTR szFont,int nSize,int nNormalStyle,int nSelectedStyle)
{
	LOGFONT lf;
	m_myNormalFont.DeleteObject();
	m_myNormalFont.CreatePointFont(nSize,szFont);
	m_myNormalFont.GetLogFont(&lf);
	
	// We  set the Font of the unselected ITEM
	if (nNormalStyle & TN_TEXT_BOLD)
		lf.lfWeight = FW_BOLD;
	else
		lf.lfWeight = FW_NORMAL;
	
	if (nNormalStyle & TN_TEXT_ITALIC)
		lf.lfItalic=TRUE;
	else
		lf.lfItalic=FALSE;
	
	if (nNormalStyle & TN_TEXT_UNDERLINE)
		lf.lfUnderline=TRUE;
	else
		lf.lfUnderline=FALSE;

	m_myNormalFont.DeleteObject();
	m_myNormalFont.CreateFontIndirect(&lf);
	
	// We set the Font of the selected ITEM
	if (nSelectedStyle & TN_TEXT_BOLD)
		lf.lfWeight = FW_BOLD;
	else
		lf.lfWeight = FW_NORMAL;
	
	if (nSelectedStyle & TN_TEXT_ITALIC)
		lf.lfItalic=TRUE;
	else
		lf.lfItalic=FALSE;
	
	if (nSelectedStyle & TN_TEXT_UNDERLINE)
		lf.lfUnderline=TRUE;
	else
		lf.lfUnderline=FALSE;

	m_mySelectedFont.DeleteObject();
	m_mySelectedFont.CreateFontIndirect(&lf);
}

void CTaskbarNotifier::SetTextColor(COLORREF crNormalTextColor,COLORREF crSelectedTextColor)
{
	m_crNormalTextColor=crNormalTextColor;
	m_crSelectedTextColor=crSelectedTextColor;
	RedrawWindow();
}

void CTaskbarNotifier::SetTextRect(RECT rcText)
{
	m_rcText=rcText;
}

BOOL CTaskbarNotifier::SetSkin(UINT nBitmapID,short red,short green,short blue)
{
	BITMAP bm;
	
	m_biSkinBackground.DeleteObject();

	if (!m_biSkinBackground.LoadBitmap(nBitmapID))
		return FALSE;
	GetObject(m_biSkinBackground.GetSafeHandle(), sizeof(bm), &bm);
	m_nSkinWidth=bm.bmWidth;
	m_nSkinHeight=bm.bmHeight;
	m_rcText.SetRect(0,0,bm.bmWidth,bm.bmHeight);

	if (red!=-1 && green!=-1 && blue!=-1)
	{
		// No need to delete the HRGN,  SetWindowRgn() owns it after being called
		m_hSkinRegion=GenerateRegion((HBITMAP)m_biSkinBackground.GetSafeHandle(),(BYTE) red,(BYTE) green,(BYTE) blue);
		SetWindowRgn(m_hSkinRegion, true);
	}

	return TRUE;
}

BOOL CTaskbarNotifier::SetSkin(LPCTSTR szFileName,short red,short green,short blue)
{
	BITMAP bm;
	HBITMAP hBmp;
	
	hBmp=(HBITMAP) ::LoadImage(AfxGetInstanceHandle(),szFileName,IMAGE_BITMAP,0,0, LR_LOADFROMFILE);
	if (!hBmp)
		return FALSE;

	m_biSkinBackground.DeleteObject();
	m_biSkinBackground.Attach(hBmp);
	GetObject(m_biSkinBackground.GetSafeHandle(), sizeof(bm), &bm);
	m_nSkinWidth=bm.bmWidth;
	m_nSkinHeight=bm.bmHeight;
	m_rcText.SetRect(0,0,bm.bmWidth,bm.bmHeight);

	if (red!=-1 && green!=-1 && blue!=-1)
	{
		// No need to delete the HRGN,  SetWindowRgn() owns it after being called
		m_hSkinRegion=GenerateRegion((HBITMAP)m_biSkinBackground.GetSafeHandle(),(BYTE) red,(BYTE) green,(BYTE) blue);
		SetWindowRgn(m_hSkinRegion, true);
	}

	return TRUE;
}

void CTaskbarNotifier::Show(LPCTSTR szCaption,DWORD dwTimeToShow,DWORD dwTimeToLive,DWORD dwTimeToHide,int nIncrement)
{
	unsigned int nDesktopHeight;
	unsigned int nDesktopWidth;
	unsigned int nScreenWidth;
	unsigned int nScreenHeight;
	CRect rcDesktop;

	m_strCaption=szCaption;
	m_dwTimeToShow=dwTimeToShow;
	m_dwTimeToLive=dwTimeToLive;
	m_dwTimeToHide=dwTimeToHide;

	::SystemParametersInfo(SPI_GETWORKAREA,0,&rcDesktop,0);
	nDesktopWidth=rcDesktop.right-rcDesktop.left;
	nDesktopHeight=rcDesktop.bottom-rcDesktop.top;
	nScreenWidth=::GetSystemMetrics(SM_CXSCREEN);
	nScreenHeight=::GetSystemMetrics(SM_CYSCREEN);

	BOOL bTaskbarOnRight=nDesktopWidth<nScreenWidth && rcDesktop.left==0;
	BOOL bTaskbarOnLeft=nDesktopWidth<nScreenWidth && rcDesktop.left!=0;
	BOOL bTaskBarOnTop=nDesktopHeight<nScreenHeight && rcDesktop.top!=0;
	BOOL bTaskbarOnBottom=nDesktopHeight<nScreenHeight && rcDesktop.top==0;
	
	switch (m_nAnimStatus)
	{
		case IDT_HIDDEN:
			ShowWindow(SW_SHOW);
			if (bTaskbarOnRight)
			{
				m_dwDelayBetweenShowEvents=m_dwTimeToShow/(m_nSkinWidth/m_nIncrement);
				m_dwDelayBetweenHideEvents=m_dwTimeToHide/(m_nSkinWidth/m_nIncrement);
				m_nStartPosX=rcDesktop.right;
				m_nStartPosY=rcDesktop.bottom-m_nSkinHeight;
				m_nTaskbarPlacement=TASKBAR_ON_RIGHT;
			}
			else if (bTaskbarOnLeft)
			{
				m_dwDelayBetweenShowEvents=m_dwTimeToShow/(m_nSkinWidth/m_nIncrement);
				m_dwDelayBetweenHideEvents=m_dwTimeToHide/(m_nSkinWidth/m_nIncrement);
				m_nStartPosX=rcDesktop.left-m_nSkinWidth;
				m_nStartPosY=rcDesktop.bottom-m_nSkinHeight;
				m_nTaskbarPlacement=TASKBAR_ON_LEFT;
			}
			else if (bTaskBarOnTop)
			{
				m_dwDelayBetweenShowEvents=m_dwTimeToShow/(m_nSkinHeight/m_nIncrement);
				m_dwDelayBetweenHideEvents=m_dwTimeToHide/(m_nSkinHeight/m_nIncrement);
				m_nStartPosX=rcDesktop.right-m_nSkinWidth;
				m_nStartPosY=rcDesktop.top-m_nSkinHeight;
				m_nTaskbarPlacement=TASKBAR_ON_TOP;
			}
			else //if (bTaskbarOnBottom)
			{
				// Taskbar is on the bottom or Invisible
				m_dwDelayBetweenShowEvents=m_dwTimeToShow/(m_nSkinHeight/m_nIncrement);
				m_dwDelayBetweenHideEvents=m_dwTimeToHide/(m_nSkinHeight/m_nIncrement);
				m_nStartPosX=rcDesktop.right-m_nSkinWidth;
				m_nStartPosY=rcDesktop.bottom;
				m_nTaskbarPlacement=TASKBAR_ON_BOTTOM;
			}

			m_nCurrentPosX=m_nStartPosX;
			m_nCurrentPosY=m_nStartPosY;
	
			SetTimer(IDT_APPEARING,m_dwDelayBetweenShowEvents,NULL);
			break;

		case IDT_WAITING:
			RedrawWindow();
			KillTimer(IDT_WAITING);
			SetTimer(IDT_WAITING,m_dwTimeToLive,NULL);
			break;

		case IDT_APPEARING:
			RedrawWindow();
			break;

		case IDT_DISAPPEARING:
			KillTimer(IDT_DISAPPEARING);
			SetTimer(IDT_WAITING,m_dwTimeToLive,NULL);
			if (bTaskbarOnRight)
				m_nCurrentPosX=rcDesktop.right-m_nSkinWidth;
			else if (bTaskbarOnLeft)
				m_nCurrentPosX=rcDesktop.left;
			else if (bTaskBarOnTop)
				m_nCurrentPosY=rcDesktop.top;
			else //if (bTaskbarOnBottom)
				m_nCurrentPosY=rcDesktop.bottom-m_nSkinHeight;
			
			SetWindowPos(NULL,m_nCurrentPosX,m_nCurrentPosY,m_nSkinWidth,m_nSkinHeight,SWP_NOOWNERZORDER | SWP_NOZORDER | SWP_NOACTIVATE);
			RedrawWindow();
			break;
	}
}

void CTaskbarNotifier::Hide()
{
	switch (m_nAnimStatus)
	{
		case IDT_APPEARING:
			KillTimer(IDT_APPEARING);
			break;
		case IDT_WAITING:
			KillTimer(IDT_WAITING);
			break;
		case IDT_DISAPPEARING:
			KillTimer(IDT_DISAPPEARING);
			break;
	}
	MoveWindow(0,0,0,0);
	ShowWindow(SW_HIDE);
	m_nAnimStatus=IDT_HIDDEN;
}

HRGN CTaskbarNotifier::GenerateRegion(HBITMAP hBitmap, BYTE red, BYTE green, BYTE blue)
{
	WORD wBmpWidth,wBmpHeight;
	HRGN hRgn, hTmpRgn;

	// 24bit pixels from the bitmap
	BYTE *pPixels = Get24BitPixels(hBitmap, &wBmpWidth, &wBmpHeight);
	if (!pPixels) return NULL;

	// create our working region
	hRgn = CreateRectRgn(0,0,wBmpWidth,wBmpHeight);
	if (!hRgn) { delete pPixels; return NULL; }

	DWORD p=0;
	for (WORD y=0; y<wBmpHeight; y++)
	{
		for (WORD x=0; x<wBmpWidth; x++)
		{
			BYTE jRed   = pPixels[p+2];
			BYTE jGreen = pPixels[p+1];
			BYTE jBlue  = pPixels[p+0];

			if (jRed==red && jGreen==green && jBlue==blue)
			{
				// remove transparent color from region
				hTmpRgn = CreateRectRgn(x,y,x+1,y+1);
				CombineRgn(hRgn, hRgn, hTmpRgn, RGN_XOR);
				DeleteObject(hTmpRgn);
			}

			// next pixel
			p+=3;
		}
	}

	// release pixels
	delete pPixels;

	// return the region
	return hRgn;
}

BYTE* CTaskbarNotifier::Get24BitPixels(HBITMAP pBitmap, WORD *pwWidth, WORD *pwHeight)
{
	BITMAP bmpBmp;
	LPBITMAPINFO pbmiInfo;
	BITMAPINFO bmiInfo;
	WORD wBmpWidth, wBmpHeight;

	GetObject(pBitmap, sizeof(bmpBmp),&bmpBmp);
	pbmiInfo   = (LPBITMAPINFO)&bmpBmp;

	wBmpWidth  = (WORD)pbmiInfo->bmiHeader.biWidth;
	wBmpWidth -= (wBmpWidth%4);
	wBmpHeight = (WORD)pbmiInfo->bmiHeader.biHeight;

	*pwWidth  = wBmpWidth;
	*pwHeight = wBmpHeight;
	
	BYTE *pPixels = new BYTE[wBmpWidth*wBmpHeight*3];
	if (!pPixels) return NULL;

	HDC hDC =::GetWindowDC(NULL);

	bmiInfo.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
	bmiInfo.bmiHeader.biWidth = wBmpWidth;
	bmiInfo.bmiHeader.biHeight = -wBmpHeight;
	bmiInfo.bmiHeader.biPlanes = 1;
	bmiInfo.bmiHeader.biBitCount = 24;
	bmiInfo.bmiHeader.biCompression = BI_RGB;
	bmiInfo.bmiHeader.biSizeImage = wBmpWidth*wBmpHeight*3;
	bmiInfo.bmiHeader.biXPelsPerMeter = 0;
	bmiInfo.bmiHeader.biYPelsPerMeter = 0;
	bmiInfo.bmiHeader.biClrUsed = 0;
	bmiInfo.bmiHeader.biClrImportant = 0;

	// get pixels from the original bitmap converted to 24bits
	int iRes = GetDIBits(hDC,pBitmap,0,wBmpHeight,(LPVOID)pPixels,&bmiInfo,DIB_RGB_COLORS);

	// release the device context
	::ReleaseDC(NULL,hDC);

	// if failed, cancel the operation.
	if (!iRes)
	{
		delete pPixels;
		return NULL;
	};

	// return the pixel array
	return pPixels;
}

BEGIN_MESSAGE_MAP(CTaskbarNotifier, CWnd)
	ON_WM_CREATE()
	ON_WM_MOUSEMOVE()
	ON_WM_DESTROY()
	ON_WM_ERASEBKGND()
	ON_WM_PAINT()
	ON_MESSAGE(WM_MOUSELEAVE, OnMouseLeave)
	ON_MESSAGE(WM_MOUSEHOVER, OnMouseHover)
	ON_WM_SETCURSOR()
	ON_WM_LBUTTONUP()
	ON_WM_TIMER()
END_MESSAGE_MAP()


// CTaskbarNotifier message handlers

int CTaskbarNotifier::OnCreate(LPCREATESTRUCT lpCreateStruct)
{
	if (CWnd::OnCreate(lpCreateStruct) == -1)
		return -1;

	m_hCursor = ::LoadCursor(NULL, MAKEINTRESOURCE(32649));
	return 0;
}

void CTaskbarNotifier::OnDestroy()
{
	CWnd::OnDestroy();

	// TODO: Add your message handler code here
}

void CTaskbarNotifier::OnMouseMove(UINT nFlags, CPoint point)
{
	TRACKMOUSEEVENT t_MouseEvent;
	t_MouseEvent.cbSize      = sizeof(TRACKMOUSEEVENT);
	t_MouseEvent.dwFlags     = TME_LEAVE | TME_HOVER;
	t_MouseEvent.hwndTrack   = m_hWnd;
	t_MouseEvent.dwHoverTime = 1;

	::_TrackMouseEvent(&t_MouseEvent);

	CWnd::OnMouseMove(nFlags, point);
}

void CTaskbarNotifier::OnLButtonUp(UINT nFlags, CPoint point)
{
	m_pWndParent->PostMessage(WM_TASKBARNOTIFIERCLICKED,0,0);
	CWnd::OnLButtonUp(nFlags, point);
}

LRESULT CTaskbarNotifier::OnMouseHover(WPARAM w, LPARAM l)
{
	if (m_bMouseIsOver==FALSE)
	{
		m_bMouseIsOver=TRUE;
		RedrawWindow();
	}
	return 0;
}

LRESULT CTaskbarNotifier::OnMouseLeave(WPARAM w, LPARAM l)
{
	if (m_bMouseIsOver==TRUE)
	{
		m_bMouseIsOver=FALSE;
		RedrawWindow();
	}
	return 0;
}

BOOL CTaskbarNotifier::OnEraseBkgnd(CDC* pDC)
{
	CDC memDC;
	CBitmap *pOldBitmap;
	BITMAP bm;

	memDC.CreateCompatibleDC(pDC);
	GetObject(m_biSkinBackground.GetSafeHandle(), sizeof(bm), &bm);
	pOldBitmap=memDC.SelectObject(&m_biSkinBackground);

	pDC->BitBlt(0,0,bm.bmWidth,bm.bmHeight,&memDC,0,0,SRCCOPY);
	memDC.SelectObject(pOldBitmap);

	return TRUE;
}

void CTaskbarNotifier::OnPaint()
{
	CPaintDC dc(this);
	CRect rcClient;
	CFont *pOldFont;
	char *szBuffer;
		
	if (m_bMouseIsOver)
	{
		dc.SetTextColor(m_crSelectedTextColor);
		pOldFont=dc.SelectObject(&m_mySelectedFont);
	}
	else
	{
		dc.SetTextColor(m_crNormalTextColor);
		pOldFont=dc.SelectObject(&m_myNormalFont);
	}

	szBuffer=new char[m_strCaption.GetLength()+10];
	strcpy(szBuffer,m_strCaption);

	dc.SetBkMode(TRANSPARENT); 
	rcClient.DeflateRect(10,20,10,20);
	dc.DrawText(szBuffer,-1,m_rcText,DT_CENTER | DT_VCENTER | DT_WORDBREAK | DT_END_ELLIPSIS);
	
	delete[] szBuffer;
	dc.SelectObject(pOldFont);
}

BOOL CTaskbarNotifier::OnSetCursor(CWnd* pWnd, UINT nHitTest, UINT message)
{
	if (nHitTest == HTCLIENT)
	{
		::SetCursor(m_hCursor);
		return TRUE;
	}
	return CWnd::OnSetCursor(pWnd, nHitTest, message);
}

void CTaskbarNotifier::OnTimer(UINT nIDEvent)
{
	switch (nIDEvent)
	{
		case IDT_APPEARING:
			m_nAnimStatus=IDT_APPEARING;
			switch(m_nTaskbarPlacement)
			{
				case TASKBAR_ON_BOTTOM:
					if (m_nCurrentPosY>(m_nStartPosY-m_nSkinHeight))
						m_nCurrentPosY-=m_nIncrement;
					else
					{
						KillTimer(IDT_APPEARING);
						SetTimer(IDT_WAITING,m_dwTimeToLive,NULL);
						m_nAnimStatus=IDT_WAITING;
					}
					break;
				case TASKBAR_ON_TOP:
					if ((m_nCurrentPosY-m_nStartPosY)<m_nSkinHeight)
						m_nCurrentPosY+=m_nIncrement;
					else
					{
						KillTimer(IDT_APPEARING);
						SetTimer(IDT_WAITING,m_dwTimeToLive,NULL);
						m_nAnimStatus=IDT_WAITING;
					}
					break;
				case TASKBAR_ON_LEFT:
					if ((m_nCurrentPosX-m_nStartPosX)<m_nSkinWidth)
						m_nCurrentPosX+=m_nIncrement;
					else
					{
						KillTimer(IDT_APPEARING);
						SetTimer(IDT_WAITING,m_dwTimeToLive,NULL);
						m_nAnimStatus=IDT_WAITING;
					}
					break;
				case TASKBAR_ON_RIGHT:
					if (m_nCurrentPosX>(m_nStartPosX-m_nSkinWidth))
						m_nCurrentPosX-=m_nIncrement;
					else
					{
						KillTimer(IDT_APPEARING);
						SetTimer(IDT_WAITING,m_dwTimeToLive,NULL);
						m_nAnimStatus=IDT_WAITING;
					}
					break;
			}
			SetWindowPos(NULL,m_nCurrentPosX,m_nCurrentPosY,m_nSkinWidth,m_nSkinHeight,SWP_NOOWNERZORDER | SWP_NOZORDER | SWP_NOACTIVATE);
			//RedrawWindow();
			break;

		case IDT_WAITING:
                  KillTimer(IDT_WAITING);
			SetTimer(IDT_DISAPPEARING,m_dwDelayBetweenHideEvents,NULL);
			break;

		case IDT_DISAPPEARING:
			m_nAnimStatus=IDT_DISAPPEARING;
			switch(m_nTaskbarPlacement)
			{
				case TASKBAR_ON_BOTTOM:
					if (m_nCurrentPosY<m_nStartPosY)
						m_nCurrentPosY+=m_nIncrement;
					else
					{
						KillTimer(IDT_DISAPPEARING);
						Hide();
					}
					break;
				case TASKBAR_ON_TOP:
					if (m_nCurrentPosY>m_nStartPosY)
						m_nCurrentPosY-=m_nIncrement;
					else
					{
						KillTimer(IDT_DISAPPEARING);
						Hide();
					}
					break;
				case TASKBAR_ON_LEFT:
					if (m_nCurrentPosX>m_nStartPosX)
						m_nCurrentPosX-=m_nIncrement;
					else
					{
						KillTimer(IDT_DISAPPEARING);
						Hide();
					}
					break;
				case TASKBAR_ON_RIGHT:
					if (m_nCurrentPosX<m_nStartPosX)
						m_nCurrentPosX+=m_nIncrement;
					else
					{
						KillTimer(IDT_DISAPPEARING);
						Hide();
					}
					break;
			}
			SetWindowPos(NULL,m_nCurrentPosX,m_nCurrentPosY,m_nSkinWidth,m_nSkinHeight,SWP_NOOWNERZORDER | SWP_NOZORDER | SWP_NOACTIVATE);
			//RedrawWindow();
			break;
	}

	CWnd::OnTimer(nIDEvent);
}

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About the Author

John O'Byrne
Web Developer
United States United States
I live in Santa Clara CA and work as a software engineer for SAP Business Objects.
 
My areas of expertise are user interface developments in Eclipse RCP / SWT / Draw 2D and C#

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